Automatic machine for profiling tools



Jul 115- M1924. 1.501.49

' M. U. RAMSAY ET AL AUTOMATICYMACHINE FORPROFILING TOOLS Filed Aug. 15. 1921 I 2 Sheets-Sheet 1 July '15. 1924; 1,501,496

M.-U. RAMSAYET AL AUTOMATIC MACHINE FOR PROFILING TOOLS Filed Alig. '15. 192;

.IZweIZ/11S H- J/ Patented July 15, 1924.

MARGEL ULYSSE RAMSAY AND DESIRE MARIE MOEGLEN, or BOIS-COLOMBES, FRANCE. I 1

PATENT OFFICE.

AUTOMATIC MACHINE FOR. PROFILING TOOLS.

Application filed August 15. 1921.

T 0 all 20 ham it may concern:

Be it known that we MARCEL ULYSSE RAMSAY and DIisIRE' MARIE MOEGLEN, re spectively citizens of the Swiss Republic and of the French Republic, residing at Bois-Colombes, Seine, in the Republic of France, have invented new and useful Improvements in Automatic Machines for Profiling Tools, of which the following is a specification.

This invention relates to a compound reproducing device which is applicable to the machine cutting of all pieces to any suitable profile, and particularly to pieces which it is pro-posed to obtain at difi'erent scales by the use of a single standard template or gauge, the said device obtaining in the reduced form an exact copy of the profile of the standard.

The machine described hereunder by way of example has been constructed chieflyfor the purpose of obtaining milling cutters having a constant profile for use in gear cutting, but it isalso applicable to the preparation'of all suitable milling cutters with constant profile as well as to the machine cutting of all desired profiles.

For the preparation of such milling cutters with constant profile, the current practice has been to make use of templates and gauges of various forms which it was necess'ary to construct for each size of milling cutter, but with the machine according to our invention; atraveling tool of the usual type which remains always the same is employed to automatically produce all varieties of milling'cutters 'or like tools but having different sizes, bymeans of a single standard gaugej, Y i

-The principle of operation of this machine consists in the combination of two simultaneous movements which are perpendicular to each other, one of the said movements effecting the reduction of'the abscissae to a determined scale and the other movement effecting the reduction of the or- Idinates to the same scale in the case of any suitable geometrical figure. V

The accompanyingdrawings which are given by way of example show various embodiments of this invention.

Fig.1 showstwo corresponding profiles Serial No. 492,299.

production of any suitable number of'milling cutters at the same time.

Figs. 4 and 5 indicate the method, of; pre- .abscissae X and the ordinates Y of the profile C-D are reduced in the same ratio, he

corresponding profile c d will be obtained which is form-ed by the reduced values a 3/ and that any slight errors in the execution of the profile C-D of the standard template 4 will be reduced in the correspondingratio.

In the machine represented in Fig. 2'the re duction of the ordinates is obtained by the variable ratios of thelever arm controlling the cross feed of thetool holders 6, and the Y reduction of the abscissa: is obtained by means of a screw 22' controlling the lengthwise feed of the said tool holders andactuated by a gear set 21 whose ratio may be varied in order to'bring theminto the proper correspondence with the cross. feed.

The machine comprises two levers 9 having a variable ratio and oppositely situated 1 in order to act at the same time upon both sides of the milling cutter under operation.

The machine is driven by a belt disposed upon one of the steps of the cone pulley 1? whichefi'ects the rotation of the piece. un-

der operation 18 which in this case is'displaced in front of the tools by meansof a known device while at the same time rotating in order to produce the rellevlng.

1 is caused to actuate by a transmission, not shown, the lower screw 2 whereupon 1s displaced a threaded fork 4 controlling the two slidable members carrying the standard templates 7. The ratio of said transmission may of course be varied by changing the pinions constitutingthe same.

said levers to swing about the 'fixedaxle pin 10 secured to the framework 11. The ad-' I justable and slidablesupports 12, which also carry a pivot axle 13 whose center is located J on the line connecting the fixedaxle pin and the edge of the contact member, are secured by means of the nuts 14 to the levers 9 to V which they are firmly fixed after adjustment to a suitable distance from the axle pin 10 in .a. wheel 1 secured to the cone pulley The contact members 8 secured to the levers 9 cause the order to obtain the" desired ratio of reduction.

The supports 12 are connected by the links 15.to the tool holders 6 to which they com municate the reduced cross movement which has been given to them by the contact of the members 8 and the templates 7 during the stroke of the sliding members 3.

templates is obtained by the springs 16 connecting the ends of the levers 9, or by count'erweights, not shown. In its rotation, the

, with a single template established for a given number of teeth. The herein described arrangement also permits of operating at the same time upon any suitable number of milling cutters disposed upon the mandrel18, Fig. 3. It will suffice to mount upon the tool holders 6 the number of tools corresponding, to the number of milling cutters under operation.

Aside from the milling cutters used for gear cuttingoperations, the herein described machine will afford a means for effecting the reproduction of profiles which have been considered as impossible to reproduce by reason of the nature of the angles of contact which prevent the sliding movement of the contact member upon the reproducing device.

In Figs. 4 and 5, it is shown that by adopting for the abscissae a scale which is double, triple, quadruple, etc., that of the ordinates, a template may be produced which will not cooperate with the contact member 8 of the lever 9 at prohibitive angles, and "that all desired profiles may lie obtained by means of the herein described machine by adopting suitable relations between the lengthwise and cross feeds of the tool holders.

' ltfis obvious that this invention is not limitedto the forms of construction hereinbefore} described and represented, and that i the 's'amfemay comprise all modifications which donot'depart from the principle of ;the said' invention as set forthin the pre ceding description.

The contact between the said contact members and the flaring now described our invention, what we claim as new and desire to secure by Letters Patent is:

1. An automatic machine for profiling tools, comprising in combination a frame, a work holder, means for rotating st id work holder, a tool holder, a template, two longitudinal screws adapted to impart a lengthwise translation to said tool holdera transverse link pivoted at one end on said supporting member and at the other end on said tool holder in order to control the cross feed of the latter.

2. An automatic machine for profiling tools, comprising in combination a frame,

a work holder, means for rotating said work holder, two symmetrical tool holders, means for controlling the lengthwise feed of each tool holder, two symmetrical templates, means for imparting to said templates a translation parallel to said lengthwise feed of the tool holders and the speed whereof is in a determined ratio with that of said lengthwise feed and means cooperating with each template for controlling the cross feed of the corresponding tool holder in a determined ratio with the ordinates of the profile of said template, in order to profile the work on both sides at the same time.

'3. An automatic machine for profiling tools, comprising in combination a frame, a work holder adapted to support a plurality of pieces, two symmetrical tool holders, each tool holder being adapted to hold a number of tools equal to the number of work pieces, means for controlling the lengthwise feed of each tool holder, two symmetrical templates, 'means for imparting to said templates a translation parallel to said lengthwise feed of the tool holders and the speed whereof is in a determined ratio with that of said lengthwise feed and means cooperating with each template for controlling the cross feed of the corresponding tool holder in a determined ratio with the ordinates of the profile of said template in order to profile the pieces of work on both sides at the same time.

In testimony whereof we have signed our names to this specification.

MaRon ULYSSE RAMsAY. DESIRE MARIE MOEGLEN, 

